The Quest for Mushrooms, the quest for Mycus

Recently did a Mycus run and can honestly say it was fun. All hail the Mycus am I right?

But it’s gotten me thinking that I’d like to take a crack at making a mod, something I’ve never done before. Still, I’d like to make a scenario centered on finding the Mycus towers. In the form of a trackable quest, centerlized gear (or schematics for such) made to repersent the glorious Mycus after joining. An other bonus goals such as, starting a Mycus Cult/Colony, spreading the Mycus, or all of the above.

So, any suggestions? and how do I start?